1. Describe one example of what the meaning of regulative ''development" is?
2. What are the features of cleavage?
3. Describe one example of how cytoplasmic?
4. Why is gastrulation cinsidered to be the most important time in your life?
5. How is the Dorsal-Ventral (D-V) axis specified and patterned in Xenopus?
6. Progress on the mechanism of sex determination ?